Chain pipe-wrench.



NO. 876,926. Y PATENTED JAN. 21, 1908. G. AMBORN.

CHAIN PIPE WRENCH.

APPLICATION FILED MAY @1907.

2 SHEETSSHEET 1.

ENVENTOR WlTNESSES:

6 Paw,

No. 876,926. PATENTED JAN. 21, 1908.

G. AMBORN.

CHAIN PIPE WRENCH.

APPLICATION FILED MAY 6.1907.

2 SHEETS-SHEET 2.

INVENTOR 1 WITNESSES:

i i nnrTnn sTnTns rnTnnT orrron GEORGE AMBORN, or

CHAIN PIPE-WRENCH.

No. erases.

Specification of Letters Patent.

Patented Jan. 21, 1908.

Application filed May 6. 1907. Serial No; 372.037-

To all, whom it may concern:

Be it known that I, GEORGE AMBoRN, a citizen of the United States, residing in the borough-of Brooklyn, county of Kings, city and State of N ew York, have invented certain new and'useful Improvements in Chain Pipeewrenches, of which the following is a specification.

This invention relates to chain pipe wrenches or the like and aims to. provide certain impi'ovements'therein.

The present invention relates particularly to that type of'wrenc'hin which laterally separated jaws are provided between which the chain is' centrally pivoted so that it may swing to one side or the other and thus be adapted for operationyin' connection with either of the working faces of the jaws.

The principal object of the present inven tion-is to provide a wrench of this type in which the jaws are double ended so that each is provided with two sets of working faces,

- such jaws being adapted to be reversed with ,relationto the handle so that one or the other set of Working faces may be brought into operative position. in the preferred construction of my invention, the chain is pivoted in a fixed position centrally of the jaws, so that it is not necessary to detach it when the jaws are reversed. Preferably also I provide a single lock on each side of the wrench which is adapted to operate when the jaws are in either position relatively to the handle.

By my invention I am enabled to provide a reversible jawed wrench, the jaws of which are but little longer than in the ordinary fixed jawed constructions.

Referrin to the drawings which illustrate several em odiments of my invention, Figure 1 is a side elevation of the wrench showing the preferred construction; Fig. 2 is a top or plan view; Fig. 3 is an elevation of the inner side of one of the jaws; Fig. 4 is a section on the line Jr-- 1 in Fig. 1; Fig. 5 is a side elevation showing a modified construction; Fig. 6 is a section on theline 6--6 in Fig. 5.

Referring first-t0 Figs. 1 to 4, let A indicate a suitable handle or shank which has fixed to its forward end two jaws B, B as shown.

Each of the jaws B, B is double ended, that is to say, instead of having only the working faces a, a on' its front end, these j faces are duplicated as shown at b, b at its rear end. Preferably the faces a and b and u/ and b" are connected respectively by a curved portion 0, or 0, such portions in use serving as gages by which the necessary length of loop of the chain can be determined in a well known manner. in the present construction the portions 0, c are adapted for use either in the normal or reversed position of the jaws.

The jaws-are preferably fixed to the handie by means of bolts (11 and a, the former of which passes through holes f, f in the jaws and a hole It in the handle, and the latter of which passes through holes 9 in the jaws and /z. in the handle. Preferably the jaws are slotted to receive the sides of the handle. The bolt 0 also serves as a pivot pin for the eye to which the chain is connected. it is important that the bolt 11 be centrally arranged, that is to say, that it shall be disposed in such a position that the chain (J shall be capable of swinging [10 either the upper or under side of the wrench so as to bring the upper or lower working face (L or a into operation. This arrangement of the pivot pin of the chain is also important in that it enables the chain to act from the same point when the-jaws are reversed, so that it is not necessary to alter the position of the pin or other connection. in the present construction, in order to reverse the jaws the bolt (1 is removed and the bolt a slackenod sulliciently to permit the disengagement of the jaws from the handle whereupon they may be adapted to engage the chain in both positions of the jaws. The form of the lock depends more or less upon the type of chain which is used. 1 have illustrated in Fig. 1 a chain composed of flat links having their pivot pinsextended laterally outward to form locking pintles, and in connection with this form of chain I prefer to employ the lock turned around the bolt 6 to their reverse po NEW YORK, N. Y., ASSIGNOR TO J. H. WILLIAMS 8: 00., OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

I illustrated in Fig. 3.

This figure shows one side of the lock, this side being duplicated on the opposite jaw. As shown the lock comprises two hook-like members m, n which face in opposite directions. Each of such members has a recess m or n which is adapted to be engaged by a pintle of the chain. Each of the hooks is extended such a distance with relation to the opposite recess that when a pintle is engaged in either recess the next succeeding pintle can just passover the opposite hook. In order to engage the chain with the lock, the desired pintle is brought rearwardly into the recess a whereupon the neirt rearward pintle slips overthe rear hook and the chain 'is' then in position for use. It is to be noted that while the rear hook acts to hold the chain against the'forward stress in use, the front hook acts as a retaining device therefor. This is an important feature since in many positions of use the chaintends to slip out of'engagement with the lock. With the present construction of lock this is possible only when one of the pintles is in close engagement with the bottom or end of the locking recess, and even I under these circumstances it is necessary that the adjacent pintle shall be moved lat orally outward in order that the engaged pintle may be then disengaged. These movements seldom if" ever accidentally occur in practice. The opposite half of the lock formed upon the j aw B is of the same c0n-, strnction as that just described. It will be 'understood that this construction of lock is 1 du licated on the under side of the wrench.

use the wrench isemployed in the on I dinary manner, the working face a or a bein?x brought into operation as convenient W en these faces become worn or dull the aws niay be reversed. and the working faces and 1; brought to the front. v

In'Figs. 5 and 6 I have illustrated my invention as applied'to a wrench having a chain, the links of which"are formed withside wings or lugs which are adapted-to engage the locking means on the jaws or hen-Y.

1e; Suchllugs are indicated at g With this construction Of chain I prefer :llO construct the Blocks 7 as circular projections.

formed on'th'e inner sides of the jaws,- such projections being engagedat theirirear by the lugsg' on the chain. lt. ."Will-be'noted.in this construction asinthat hereinbefore gle-j scribed that the same locks arev adapted to operate -in boththe normal and the reverse positions of the jaws.

, It will beseen that by myinvention-I proride a chain pipe wrenc or analogous device n whlch the wrench has double the wearing capacity o f'thesi ngle jawed wrenches now in use, and in which the jaws have butlittle fireaterlength and weight than those having ut two working faces'. It will also be oh servedthat I rovid a constru on in which erases "the chain is connected to thawrench at a single' fixed point from which it iscapable of operation in all positions of. the jaws: 'I'"his is es eciall irn ortant in the t'*' e of wrench P d P t J P shown wherein the chain is loclredupon the opposite side to the pipe. It .isalso to be noted thatby myinvention'i am able to provide a single lock which; is ca able of operationwhen the jaws are in sit or their normal or' reverse positions. This is of considerable advantage in thatit permits me to shorten the length of the jaws and to discard a lock oneach side of the wrench f I It will be observed that I do not wish to be limited to the modifications of my invention herein shown as many changes maybe made therein without-departing from the invention. y c I It to be understood that my invention is applicable to other devices than chain wrenches, such'for instance, as chain pipe vises or the like. i

. What I claim is: I

1. in a chain pipe wrench,.th e combination of a handle, a double ended reversible jaw" connected therewith,'.- a chain pivoted centrally of said jaw wherebylsuch' chainacts from the same point when the jaw is reversed and locks formed upon the j aw for engaging 1 such chain. l 2. In a chain pipe wrench, the cornbina tion of a handle, a double ended reversible .jaw connected; therewith, a chain pivoted thereto, and a single lock "fixed relatively to the 'j aw forengaging such chain in both, posi tions cl. s'aid'jaw;, i q

a chain pipe wrench, the combination ,oia'handle, a'double ended reversible aw donn'ected therewith, a chain pivoted centrally ofs'aid jaw whereby such chain acts from the same point when the jaw is reversed, t and a single lock fixed relatively to the jaw for engaging such chain in both positions of said' awi Q I a 4,111 avchain pipe wrench, the combinationof a'handle, a double ended reversible 'fjawconnected therewith, a chain connected with such wrench, and a lock for engagin suchchain in both' positions of said jaw,- sai ilo'ck havjiii. two hookelike-members eachof whichisa apted to act as a locking member in; onefiposition of ;the; jaw and a retaining a member'in the otherposition.ofthejaw.

In? a chain pipe wrench; the combinationpf a'frhandle, a double ended reversible jaw connected therewith} a chain having gintles, an clfa lock engaging such intles in I 0th positions of the jaw, such loc havingtwohook-hke members reversely arrange and two oppositely; arranged recesses, such parts being proportioned s thatwhen one of such pintles is' 'in position at the bottom ot, one recessthe next adjacent pintle can pass over the end, of the opposite hook-like 'Iueni- I connection, and locks formed upon thejaws 1 for engaging said chain.

In witness whereof, I have hereunto signed my name in the presence of two subscribing I Witnesses. I

GEORGE AMBQRN.

Witnesses: I EUe 'JNE V. MYEne, THEODORE T. SNELL. 

